The first thing you notice is that the second hand is going anti-clockwise. Then you realise that, although it all looked normal enough at first glance, only two of the numbers are where you would expect them to be. In fact the whole thing is set up to run backwards, &, once you are used to it, it's perfectly easy to read. The glass-fronted frame is 28cm in diameter, a large easy-to-read wall clock. It makes daily life a little more interesting, gives visitors something to wonder about, raises a smile. Not bad for a clock! Requires 1 x AA battery